更新1:
Suppose a lamp is placed in front of a plane mirror.Rays of light are sent from the lamp in all directions.Rays diverge from the lamp,and on reflection diverge from the mirror. These divergent rays appear to come from a point behind the mirror.
更新2:
An observer sees the image of the lamp at this point.Rays do not actually come from the image, so the image is called a virtual image.It cannot be projected on a screen. The rays and the image are virtual ang are represented by dotted lines. 求大家解釋下呢段野比我知啊?我要做project,但系唔識得解
更新3:
可以用再寫一段與這段文字意思相同但系用字唔一樣的段落嗎??